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interview question...

Unanswered Question
Apr 2nd, 2006
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in interview i have faced this question.

question: I have 200 servers they are connected to 20 layer2 access switches (each server connected to two switches for redundancy)

20 layer2 access switches are connected to 2 layer3 distribution switches. (each access switch connected to two distribution switches)

2 layer3 switches are connected to two routers, where each router is connected to one ISP.( each distribution switch connected to two routers)

If I want no single point of failure in the network, what are the protocols to be used on each device?

on servers?

on access switches?

on distribution switches?

on edge routers?



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Overall Rating: 4 (1 ratings)
mahmoodmkl Sun, 04/02/2006 - 06:48
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what sort of redundency they want for example for gateway redundency u can go for HSRP at u r distribution layer if u want.

and on access switches u can go for UPLINKFAST.

on servers i think there is no need.may some others have different view.

and on edge routers u can go for VVRP or GLBP

Hope this helps


mheusinger Sun, 04/02/2006 - 15:59
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I would suggest:

servers: NIC teaming (active/standby for the server IP!)

between servers and L3 switches: HSRP/VRRP/GLBP (redundant default gateways)

between L2 and L3 switches: Rapid STP (needed because of NIC teaming and L2 redundancy)

between L3 switches and edge routers: OSPF (could be any dynamic IP routing protocol able to handle the default route to the internet)

between edge router and ISP: eBGP

between edge routers: iBGP

Hope this helps! Please rate all posts.

Regards, Martin


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